PSN-PZN-PZT四元系压电陶瓷锰掺杂改性研究

Study on the property of PSN-PZN-PZT ceramics doped by Manganese

作者采用传统的电子陶瓷工艺制备了PSN-PZN-PZT四元系压电陶瓷,考察了锰掺杂对材料的微结构及压电性能的影响.实验结果表明,在较宽的锰掺加量范围内,样品都可以得到完全的钙钛矿相结构,适量的锰掺杂不仅可以优化材料的压电性能,而且可以改善体系的温度稳定性能.同时,锰掺杂使PSN-PZN-PZT陶瓷的损耗tanδ降低,机械品质因数Qm增高,当掺杂量为0.5wt%时压电陶瓷具有最好的综合机电性能d33=313pC/N,kp=0.52,Qm=1466,tanδ=0.40%,有望在超声马达中获得应用.

The piezoelectric ceramics of PSN-PZN-PZT are prepared by traditional ceramics method. The influence of Mn-doping on the microstructure and piezoelectric properties are investigated. The authors found that manganese dopants can not only optimize piezoelectric properties of the species, but also improve the temperature stability. The resonance frequency temperature dependency of the modified ceramics decreased sharply. Furthermore, with the increasing of manganese, tanδ decreased but the Q_ m improved. The e...